Thanks. I go by Catro. My irregulat heartbeat is relatively recent. I noticed it a little over a month ago. Started supplementing with magnesium and it went away for awhile but is back now and magnesium no longer seems to work. Had my blood level checked and it was 7.7 on a 1-15 scale of normal. I have an appointment with my cardiologist Wednesday. He has been following me for a mild aortic valve regurgitation since I had a triple bypass three years ago. Could there be a connection? I hope to find out.